PLATE V. 



FIG. 



1. A grain of barley greatly magnified, showing the small hard 



body n — the needle — at the base of the grain covering the 

 folds of the outer skin. 



2. Another (damaged) grain. The outer seed-coat (//) has been 



raised to show the manner in which it separates with force, 

 the central portion being cut away; hh, is the inner coat. 

 The " needle " in this specimen was wanting. 



3. Another (perfect) grain, in which is present a peculiar minute 



body overlying the inner coat — the tuft, t : h and h h as in 

 previous figure. 



4. The ?ieedle, greatly magnified. 



5. Hard silicated hairs from its borders, highly magnified, 



6. The tuft removed from base of grain : W7v, wings ; s, spongiole. 



7. The position of the tuft (/) relatively to the embryo {e) when the 



grain is cut across : a, albumen of the seed ; hh, outer seed-coat. 



8. A minute portion of wing of tuft highly magnified, showing the 



cellular tissue to which the long delicate filaments are 

 attached. 



9. Section of seed through the embryo (e), highly magnified : 



s, seed-coats ; a, albumen deprived of starch. 



10. Horizontal section of upper or leaf portion of embryo. 



11. Ditto, of portion forming rootlets. 



1 2. Starch granules from albumen of seed, greatly magnified. 



